These links in the deprecation warning on some Python 2 stdlib libraries documentation pages pointing to Python 3 alternatives return 404s. 

The link behind the words "Python documentation for the current stable release."

Examples:
https://docs.python.org/2/library/cgihttpserver.html
https://docs.python.org/2/library/basehttpserver.html
https://docs.python.org/2/library/simplehttpserver.html
https://docs.python.org/2/library/httplib.html
https://docs.python.org/2/library/cookie.html

The current methodology used is to replace the `2` with a `3` when making a new url and the challenge is that some libraries names changed.

Thanks for the report!  If the links are always to ../3/.. it should be easy to set up permanent redirects on the website to the most appropriate webpage in the current Python 3 docset. If someone could produce a list of 2 to 3 mappings here, creating the redirects should be trivial.  The hard part is finding the missing links and figuring out the best replacements for each.

@Ned, I'm going to search through the docs for any links that may need redirecting, and provide their python3 alternatives.

It looks like all the pages listed were updated with working links to current stable release docs, so this can be closed and if somebody finds more broken links, this issue can be reopened later.